Can a hip muscle strain cause numbness?

Not likely: A muscle strain in and of itself should not cause numbness. However, if an associated nerve was stretched, or if there was direct impact to the muscle which may have also impacted a nerve, or if there is significant swelling that could be affecting a nerve, then numbness may result.

Potentially: Numbness suggests a neurological etiology, which can occur indirectly from a muscle strain from the subsequent swelling that can result. Don't hesitate to be seen for a thorough evaluation.